protected SynchronizationWorkItem(string fileName, string sourceServerUrl, TransactionalStorage storage)
{
Storage = storage;
FileName = fileName;
FileAndPages fileAndPages = null;
Storage.Batch(accessor => fileAndPages = accessor.GetFile(fileName, 0, 0));
FileMetadata = fileAndPages.Metadata;
ServerInfo = new ServerInfo
{
Id = Storage.Id,
Url = sourceServerUrl
};
conflictDetector = new ConflictDetector();
conflictResolver = new ConflictResolver();
}
private void SaveSynchronizationSourceInformation(ServerInfo sourceServer, Guid lastSourceEtag,
StorageActionsAccessor accessor)
{
var lastSynchronizationInformation = GetLastSynchronization(sourceServer.Id, accessor);
if (Buffers.Compare(lastSynchronizationInformation.LastSourceFileEtag.ToByteArray(), lastSourceEtag.ToByteArray()) >
0)
{
return;
}
var synchronizationSourceInfo = new SourceSynchronizationInformation
{
LastSourceFileEtag = lastSourceEtag,
SourceServerUrl = sourceServer.Url,
DestinationServerId = Storage.Id
};
var key = SynchronizationConstants.RavenSynchronizationSourcesBasePath + "/" + sourceServer.Id;
accessor.SetConfig(key, synchronizationSourceInfo.AsConfig());
Log.Debug("Saved last synchronized file ETag {0} from {1} ({2})", lastSourceEtag, sourceServer.Url, sourceServer.Id);
}
private void PublishSynchronizationNotification(string fileName, ServerInfo sourceServer, SynchronizationType type,
SynchronizationAction action)
{
Publisher.Publish(new SynchronizationUpdate
{
FileName = fileName,
SourceServerUrl = sourceServer.Url,
SourceServerId = sourceServer.Id,
Type = type,
Action = action,
SynchronizationDirection = SynchronizationDirection.Incoming
});
}
private void AssertConflictDetection(string fileName, NameValueCollection localMetadata,
NameValueCollection sourceMetadata, ServerInfo sourceServer,
out bool isConflictResolved)
{
var conflict = ConflictDetector.Check(fileName, localMetadata, sourceMetadata, sourceServer.Url);
isConflictResolved = ConflictResolver.IsResolved(localMetadata, conflict);
if (conflict != null && !isConflictResolved)
{
ConflictArtifactManager.Create(fileName, conflict);
Publisher.Publish(new ConflictDetected
{
FileName = fileName,
SourceServerUrl = sourceServer.Url
});
Log.Debug(
"File '{0}' is in conflict with synchronized version from {1} ({2}). File marked as conflicted, conflict configuration item created",
fileName, sourceServer.Url, sourceServer.Id);
throw new SynchronizationException(string.Format("File {0} is conflicted", fileName));
}
}
private void FinishSynchronization(string fileName, SynchronizationReport report, ServerInfo sourceServer,
Guid sourceFileETag)
{
try
{
// we want to execute those operation in a single batch but we also have to ensure that
// Raven/Synchronization/Sources/sourceServerId config is modified only by one finishing synchronization at the same time
SynchronizationFinishLocks.GetOrAdd(sourceServer.Id, new ReaderWriterLockSlim()).EnterWriteLock();
Storage.Batch(accessor =>
{
SaveSynchronizationReport(fileName, accessor, report);
FileLockManager.UnlockByDeletingSyncConfiguration(fileName, accessor);
if (report.Exception == null)
{
SaveSynchronizationSourceInformation(sourceServer, sourceFileETag, accessor);
}
});
}
catch (Exception ex)
{
Log.ErrorException(
string.Format("Failed to finish synchronization of a file '{0}' from {1}", fileName, sourceServer), ex);
}
finally
{
SynchronizationFinishLocks.GetOrAdd(sourceServer.Id, new ReaderWriterLockSlim()).ExitWriteLock();
}
}
